To find the values of \( y \) for the function \( y = \sqrt{-2x + 1} - 3 \), we need to evaluate the expression for each given \( x \) in the table.
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For \( x = -1 \): \[ y = \sqrt{-2(-1) + 1} - 3 = \sqrt{2 + 1} - 3 = \sqrt{3} - 3 \approx -1.268 \]
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For \( x = 0 \): \[ y = \sqrt{-2(0) + 1} - 3 = \sqrt{0 + 1} - 3 = \sqrt{1} - 3 = 1 - 3 = -2 \]
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For \( x = 3 \): \[ y = \sqrt{-2(3) + 1} - 3 = \sqrt{-6 + 1} - 3 = \sqrt{-5} \] Since the square root of a negative number is not defined in the real number system, \( y \) is not defined for \( x = 3 \).
Now we can fill in the table:
\[ \begin{array}{|c|c|} \hline x & y \ \hline -1 & \sqrt{3} - 3 \approx -1.268 \ 0 & -2 \ 3 & \text{undefined} \ \hline \end{array} \]
So, the completed table is:
\[ \begin{array}{|c|c|} \hline x & y \ \hline -1 & -1.268 \ 0 & -2 \ 3 & \text{undefined} \ \hline \end{array} \]